Calculator.



Patented Oct. 3, i899. W. D. CNKLIN.

CALCULATOR.

(Application led Nov. 2, 1898,)

(No Model.)

/NVENTO/ ATTORNEYS ma .wams paens co4 PnoToALlTNoJ-usnmuon, n. c.

'UNrrin Startins Parent Ormea VILLIAM D. OONKLlN, OF RUTHEREORD, NEV JERSEY, ASSIGNOR OF ONE- UALE TO JAMES J. MCKENZE, OE SAME PLACE.

SALOU LTOP.

SPECIFCATION forming part of Letters Patent No. (333,989, dated October 8, 1899.

Application filed November 2, 1898. Serial No. 695,289. (No model.)

To all whom t '11m/y concern: l bed-plate 7, on which are laid a number of Be it known that I, VILLIAM D. CON-RLIN, parallel strips S, spaced apartfrom each other, of Rutherford, in the county of Bergen and so that the sliding amount-plates 9 may be State of New Jersey, have invented a new laid between them, with the edges of the 55 and Improved Calculator, of which the folplates 9 against the adjacent edges of the lowing is a full, clear, and exact description. plates S. The plates 8 and 9 are of the same This invention relates to a calculator dethickness, andthe plates 9 have iinger-pieces signed especially for calculating wages, the 10 attached thereto, by which to slide the wage per hour, day, or week, and number ot' plates 9, the outward-sliding movement ol? 6o 1o hours of service being given. the plates being limited by the walls of the The invention is also applicable to other base or tray t3. The plates 9 are provided matters of calculation, as will appear from with a series ci numbers 1i, which reprethe following description. sent the amount of pay due to the employee This specification is the disclosure ot one for the certain number ot hours which he has 65 form of my invention, while the cla-ims dene served.

the actual scope thereof. Laid across the plates S and 9 and trans- Reterence is to be had to the accompanying versely thereof are spacing-plates 12, similar dravvings, forming a part of this specification, to the plates S and having cover-plates 14 arin which similar characters of referenceindiranged between them edge to edge. These 7o 2o cate corresponding parts in all the figures. plates l-l slide as do the plates 9, except that Figure 1 is aplan View of the invention with they move in lines at right angles to the plates parts broken away. Fig. 2 is asectional view 9. The cover-plates 1l are manipulated by on the line 2 2 of Fig. 1. Fig. 3 is a similar nger-pieces 15 and are provided with openview on the line 3 3 of Fig. 1. Fig. it is a ings 1G, which openings are one foreach of 75 z5 plan View of one of the sliding cover-plates, theamount-plates 9, the purpose of said opent and Fig. 5 is a perspective view of one of the ings being to upon the outward movement of sliding amount-plates. the plates le expose the numbers on the plates The drawings show a calculator adapted to 9, asis shown in reference to one of the covercalculate wages up to ten dollars per week platesin Eig.1,suchcoverplate beingmoved 8o 3o and twenty hours of service. It will of course outward to expose the number 9e on one of be understood that this is a mere fragment of the amount-plates 9. the complete apparatus, which will in prac- Laid on the upper faces of the plates 12 tice be very much enlarged to meet the reand 14 is a face-plate 17, which is formed quirements of practical operation. Ordinawith a series of regularly-arranged openings 85 rily it will be desirable to enlarge the calcu- 18, through which maybe read the indications s lator so that it will permit calculating wages of the calculator. All of the parts 7, 9, 14k, as high as twenty-tive or thirty dollars per and 17 are held rigidly together by means of week and for as many as seventy or eighty bolts or other desired fastening devices 19 hours service in each week. Ordinarily perpassed through said parts and situated so as 9o 4o sons are employed at so much per week,countnot to interfere with the sliding plates 9 and ing sixty hours as one week. It is rare, of 1t. This construction provides, therefore, a course, that employees make exactly sixty rigid framework in which the two tiers of hours each week. Some weeks less time and sliding plates 9 and 1-i are arranged, the tier other weeks more time will be served. rllhis l-.t being above the tier 9 and the two sets of 95 device is adapted, essentially, therefore, to plates sliding at right angles, the plates 9 to the calculation of the proper pay to be given bring the numbers 11 in position for expofor the number of hours served each week. sure and the plates 1-1- to move the openings l The apparatus is placed in a tray or box 6, 16 over the numbers, and thus eftect the deconstructed, preferably, of wood and in consired exposure of the number that is moved roo 5o venient form to be laid upon a desk or countinto position by the movement of the plate ing-table. Situated in the tray or base 6 is a 9. rEhe calculator being placed in the box or of the box serve to limit the outward movement of both sets of plates 9 and 14E.

Each of the cover-plates let is indexed by a number, such as the number 20, such number representing the amounts per week that are paid to the employees, and each plate 9 is indexed by numbers, such as the number 2l, these numbers indicating the hours that are served bythe employees. Assu1'ning,there fore, that an employee is paid three dollars and seventy-five cents per Week of sixty hours and that this employee serves fifteen hours as a certain Week, his wage is calculated therefor by drawing out the cover-plate 14 that is indexed by the number 20, as $3.75, and the amount -plate 9, that is indexed by the number 21, as 15, is also drawn out. This moves up for exposure the number 911: on the said amount-plate 9, and the adjacent opening 16 in the cover-plate will expose this number, which represents the amount due the employee-that is to say, ninety-four cents. I will not explain the system by which the plates 9 are provided with the numbers l1, since this is a mere matter of mathematical calculation that is Well understood. ,l

Various changes in the form, proportion, and minor details of my invention may be resorted to Without departing from the spirit and scope of my invent-ion. Hence l do not consider myself limited to the precise details herein shown, but l am entitled to all such variations as come within the scope of my claims.

Having thus described my invention, I

claim as new and desire to secure by Leiters Patentl. A calculator' of the character described, comprising a base-plate provided with sets of guideways arranged one above the other and at right angles to each other, imperforate plates sliding in the lower set ot' the guideways and each bearing` numbers representing the amounts of pay due for a certain number of hours, and indexed to indicate the hours served, perforated plates sliding in the upper set of guideways and each indexed to indicate the amount of Wages for a given time, and a perforated face-plate above the said sliding plates, substantially as described:

A ealeulatoref the character described, consisting of a tray orbox, a base-plate in the tray or box and of less area than the same, said base being provided with sets of guide- Ways arranged one above the other and at right angles to each other, imperforate plates sliding in the lower set of guideways and each bearing numbers.representing the amounts of pay due for a certain number of hours, perforated plates sliding in the upper set of guidevvays, and a perforated face-plate secured to the base-plate above the guideways, said faceplate being provided on one edge opposite the perforated plates with numbers representing the Wages for a given time and on another' edge opposite the amount-plates with numbers representing the hours served, substantially as described.

VILLIAM D. CONKLlN.

lVitnesses: Y

ISAAC B. OWENS, EvERARD BOLTON MARsiL-rLL. 

